|Sly owns the darkest night in this costume. Cloaked in shadow, he's a tireless force for justice... and picking pockets!|
— In-game description[src]
Ultimate Sly is a skin available for Sly Cooper to wear in Sly Cooper: Thieves in Time. It can be obtained by collecting 15 Sly Masks. It puts Sly into a red and black super hero costume, reminiscent of Batman from DC Comics.
Like most other Sly Masks awards, it is for visual purpose only and makes no changes to gameplay.